gain

Web crawling framework based on asyncio.

Programming language: Python

License: GNU General Public License v3.0 only

Tags: Web Frameworks     Web Crawling     Web Content Extracting    

README

Web crawling framework for everyone. Written with asyncio, uvloop and aiohttp.

[](img/architecture.png)

Requirements

• Python3.5+

Installation

pip install gain

pip install uvloop (Only linux)

Usage

1. Write spider.py:

from gain import Css, Item, Parser, Spider
import aiofiles

class Post(Item):
    title = Css('.entry-title')
    content = Css('.entry-content')

    async def save(self):
        async with aiofiles.open('scrapinghub.txt', 'a+') as f:
            await f.write(self.results['title'])


class MySpider(Spider):
    concurrency = 5
    headers = {'User-Agent': 'Google Spider'}
    start_url = 'https://blog.scrapinghub.com/'
    parsers = [Parser('https://blog.scrapinghub.com/page/\d+/'),
               Parser('https://blog.scrapinghub.com/\d{4}/\d{2}/\d{2}/[a-z0-9\-]+/', Post)]


MySpider.run()

Or use XPathParser:

from gain import Css, Item, Parser, XPathParser, Spider


class Post(Item):
    title = Css('.breadcrumb_last')

    async def save(self):
        print(self.title)


class MySpider(Spider):
    start_url = 'https://mydramatime.com/europe-and-us-drama/'
    concurrency = 5
    headers = {'User-Agent': 'Google Spider'}
    parsers = [
               XPathParser('//span[@class="category-name"]/a/@href'),
               XPathParser('//div[contains(@class, "pagination")]/ul/li/a[contains(@href, "page")]/@href'),
               XPathParser('//div[@class="mini-left"]//div[contains(@class, "mini-title")]/a/@href', Post)
              ]
    proxy = 'https://localhost:1234'

MySpider.run()

You can add proxy setting to spider as above.

1. Run python spider.py

2. Result:

[](img/sample.png)

Example

The examples are in the /example/ directory.

Contribution

• Pull request.
• Open issue.